render: Delete PictureGradientColor()

PictureGradientColor(), INTERPOLATE_PIXEL_256() and premultiply() are
not used by anything.

Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Soren Sandmann <ssp@redhat.com>

2 files changed, 0 insertions, 50 deletions

diff --git a/render/picture.c b/render/picture.c
index e7e1f2b41..058db2b72 100644
--- a/render/picture.c
+++ b/render/picture.c
@@ -811,51 +811,6 @@ static CARD32 xRenderColorToCard32(xRenderColor c)
         (c.blue >> 8);
 }
 
-static unsigned int premultiply(unsigned int x)
-{
-    unsigned int a = x >> 24;
-    unsigned int t = (x & 0xff00ff) * a + 0x800080;
-    t = (t + ((t >> 8) & 0xff00ff)) >> 8;
-    t &= 0xff00ff;
-
-    x = ((x >> 8) & 0xff) * a + 0x80;
-    x = (x + ((x >> 8) & 0xff));
-    x &= 0xff00;
-    x |= t | (a << 24);
-    return x;
-}
-
-static unsigned int INTERPOLATE_PIXEL_256(unsigned int x, unsigned int a,
-                                          unsigned int y, unsigned int b)
-{
-    CARD32 t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
-    t >>= 8;
-    t &= 0xff00ff;
-
-    x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
-    x &= 0xff00ff00;
-    x |= t;
-    return x;
-}
-
-CARD32
-PictureGradientColor (PictGradientStopPtr stop1,
-		      PictGradientStopPtr stop2,
-		      CARD32	          x)
-{
-     CARD32 current_color, next_color;
-     int	   dist, idist;
-
-     current_color = xRenderColorToCard32 (stop1->color);
-     next_color    = xRenderColorToCard32 (stop2->color);
-
-     dist  = (int) (256 * (x - stop1->x) / (stop2->x - stop1->x));
-     idist = 256 - dist;
-
-     return premultiply (INTERPOLATE_PIXEL_256 (current_color, idist,
-					       next_color, dist));
-}
-
 static void initGradient(SourcePictPtr pGradient, int stopCount,
                          xFixed *stopPoints, xRenderColor *stopColors, int *error)
 {
diff --git a/render/picturestr.h b/render/picturestr.h
index 7c7edb1c4..8b387f7d9 100644
--- a/render/picturestr.h
+++ b/render/picturestr.h
@@ -614,11 +614,6 @@ CompositeTriFan (CARD8		op,
 		 int		npoints,
 		 xPointFixed	*points);
 
-extern _X_EXPORT CARD32
-PictureGradientColor (PictGradientStopPtr stop1,
-		      PictGradientStopPtr stop2,
-		      CARD32	          x);
-
 extern _X_EXPORT void RenderExtensionInit (void);
 
 Bool